"I went out, actually, a few months ago with a friend. And I was so uncomfortable," the star tells Lauer. "Not because I felt tempted, just because it was just the same thing that it always was before. And it just wasn't fun for me. I've become more of a homebody. And I like that."

Lohan, whose struggles with drugs, alcohol and the law are well-known, tells Lauer she's now "clean and sober," and acknowledges, "I still need to go through the process of proving myself."

In addition to SNL, the once white-hot star also confirms plans to play Elizabeth Taylor in an upcoming biopic. "We start production soon," Lohan says. "I've been doing tons of research. But I've always kind of researched her. She's always been a fascinating woman to me. So I'm really honored. And I will not let anyone down, especially myself."

The actress is well aware that many filmmakers blanche at the prospect of insuring her on a project. "I could see where it could be scary for people to invest in me," she says. "And I don't want people to have that reason to be scared anymore. So being able to have this opportunity with SNL and the film, I'm gonna do what I'm supposed to do, and enjoy doing it, and do it as best as I can."